I need to know if a cbr600rr motor will fit into a 2005 trx450r frame with little modifications.
just needing to know if it will fit or not

let me know..
pm me please

if a 1000rr can fit, im sure you can make a 600 fit. do a search for 1000rr on here you should find 2 quads!
good luck, post some pics of a finished product

If you're going to go through all that work, wouldn't you want to put a bigger engine in there? I mean if it was my project, I would go 1000cc. The little 600cc would get run over by some of the 450 drag bikes no prob. Just comes down to power:weight. But in respect to your question, yes, that's gettin to be common place nowdays.

I'm sure a small block chevy could fit with the right mods lol. So yea it will fit